Improved cutter-bar for harvesters



' B. & w. JOHNSON.

Cutter Bar for Harve sters.

Patrited Aug. 10, 1869.

Wz'inemeyf N. PETERS Pholnb'hwgrapher. wmin m u. c.

- UNITED STATES PATENT OFFICE.

BENJAMIN JOHNSON, OF OARROLLTON, AND WILLIAM JOHNSON, OF HANOVER, OHIO.

IMPROVED CUTTER-BAR FOR HARVESTERS.

Specification forming part of Letters Patent N0. 93,448, dated August10, 1869.

To all whom it may concern Be it known that we, B. JOHNSON, ofCarrollton, in the county of Carroll and State of Ohio, and W. JOHNSON,of Hanover, in the county of Oolumbiana and State ofOhio, have inventeda new and useful Improvement in Cutter-Bars for Mowers and Reapers; andwe do hereby declare that the following is a full, clear, and exactdescription thereof, which will enable others skilled in the art to makeand use the same, reference being had to the accompanying drawings,forming part of this specification, in which Figure lis a top view of apart of a cutterbar to which our improvement has been attached. Fig. 2is a detail sectional view of the same taken through the line w :0,Fig. 1. Fig. 3 is a detail cross-section of the cutters taken throughthe line y y, Fig. 2.

Similar letters of reference indicate corresponding parts.

Our invention has for its object to improve the construction of thecutter-bars of reaping and mowing machines, so as to make them cut morefreely, run easier, and be less liable to become choked or clogged thanwhen constructed in the ordinary manner, and which will allow thecutters to be conveniently dressed or sharpened when desired; and itconsists in the construction and combination of various parts, ashereinafter more fullydescribed.

A are the guards, which are securely attached to the cutter-bar B, andwhich are slotted to receive the cutters or sickles O in the ordinarymanner.

D are cutters, which are made in the shape of ordinary cutters, exceptthat their forward ends may be concaved to fit upon the solid part ofthe guards A, as shown in Fig. 1. The cutters D are securely attached tothe foward part of the bar B in front of the groove in which thesickle-bar E works.

C are the ordinary sickles, which are securely attached to thesickle-bar E, and which v are made in the usual manner, except thattheyrare made longer, so that their rear ends may project ovgthe part ofthe bar B in the rear of the groove in which the sickle-bar E works.

The part b of the cutter-bar B, upon which the rear ends of the cutters0 rest, is made detachable and adjustable, beingheld in place upon theother part of the said bar B by screws, as shown in Fig. 1.

By this construction, by loosening the sai screws and placing a suitablepacking beneath thebar b,. the rear ends of the cutters G will beraised, depressing their forward ends so as to compensate for theirwear, and keep the forward or cutting parts of said cutters pressedclosely together.

It will be observed that the side or cutting edges of the cutters Dproject beyond the sides of the guards A, so that they may be Iconveniently dressed \or sharpened without removing them from themachine.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

1. The stationary cutters D, having their forward ends concave, the barB, provided with the adjustable part b, the cutters O,

sickle-bar E, when all combined and arranged with the guards A, asherein shown and described, for the purpose specified.

2. The cutters or sickles (3, extended in the rear of the sickle-bar E,in combination with the adjustable part b of the bar B, substantially asherein shown and described, and for the purpose set forth.

BENJN. JOHNSON. WILLIAM JOHNSON.

Witnesses: B. F. MARSH, JOEL WINDEBQ

